Turbulence Chapter 2: Turbulence Anisotropy in RANS
Kamil Pospiech Kamil Pospiech

Turbulence Chapter 2: Turbulence Anisotropy in RANS

Reynolds-Stress Models (RSM) aim to capture the directional complexity of turbulence where simpler models fail. This post breaks down the theory behind RSM, explains when and why it’s needed, and offers intuitive analogies and stability tips — all framed through the Socratic questions we use throughout the course.

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Turbulence Chapter 1: Review of RANS-Boussinesq Models & Statistical Turbulence Description
Kamil Pospiech Kamil Pospiech

Turbulence Chapter 1: Review of RANS-Boussinesq Models & Statistical Turbulence Description

Turbulence modeling is at the core of modern Computational Fluid Dynamics (CFD), bridging the gap between theoretical fluid mechanics and practical engineering applications. This guide explores the fundamentals of turbulence, from the Reynolds-Averaged Navier-Stokes (RANS) approach and the Boussinesq hypothesis to improved RANS models like Realizable k-ε, RNG k-ε, and curvature-corrected models. With a focus on practical CFD applications, we delve into turbulence production limiters, near-wall treatments, and Fluent best practices. This structured study consolidates critical turbulence modeling concepts, equipping CFD engineers with the knowledge to select and implement the most suitable models for their simulations.

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Exploring SQL: Building a Foundation in Data
Kamil Pospiech Kamil Pospiech

Exploring SQL: Building a Foundation in Data

Structured Query Language (SQL) is an essential tool for any data-driven project. In this post, I share my experience with the SQL course by Luke Barousse, covering everything from basic queries to advanced concepts like CTEs and subqueries. I also explain how I plan to apply these new skills in real-world SQL projects at work.

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Kaggle Playground series s5e1: Tough Beginnings
Kamil Pospiech Kamil Pospiech

Kaggle Playground series s5e1: Tough Beginnings

This blog post covers my first attempt at a Kaggle competition, where I explored data, engineered features, and trained models to predict sticker sales. Despite ranking around 1500th, I learned valuable lessons and discovered top competitor strategies that I'll dive into next.

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Citizen Data Scientist, Module III: Measuring Model Performance: Metrics That Matter
Data Science Kamil Pospiech Data Science Kamil Pospiech

Citizen Data Scientist, Module III: Measuring Model Performance: Metrics That Matter

Evaluating a machine learning model's performance is crucial to ensure it works well with unseen data. In this post, we explore key metrics for regression and classification, such as R², MSE, precision, recall, and the confusion matrix. With examples that clarify concepts like recall's importance in high-risk scenarios, we also explain k-fold cross-validation to enhance model reliability

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Citizen Data Scientist, Module II: Supervised learning: Predicting the Future with Labeled Data
Heat Transfer, Python, Data Science Kamil Pospiech Heat Transfer, Python, Data Science Kamil Pospiech

Citizen Data Scientist, Module II: Supervised learning: Predicting the Future with Labeled Data

Supervised learning is at the heart of many machine learning applications, helping models make predictions based on labeled data. From predicting house prices to classifying emails, this blog post explores the basics of supervised learning, covering regression, classification, decision trees, and key concepts like gradient descent—all in an accessible and intuitive way.

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Fluid-Structure Interaction for Beginners: From Bridges to Blood Flow
Fluid-Structure Interaction Kamil Pospiech Fluid-Structure Interaction Kamil Pospiech

Fluid-Structure Interaction for Beginners: From Bridges to Blood Flow

In this post, we explore the world of Fluid-Structure Interaction (FSI), a key area of study that reveals how fluids and solids influence each other in systems like bridges, airplanes, and even the human body. From basic principles to real-world examples, this guide will help you understand how these forces shape the structures we interact with every day.

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Citizen Data Scientist, Module I: Introduction to Data Science: Laying the Foundation
Data Science Kamil Pospiech Data Science Kamil Pospiech

Citizen Data Scientist, Module I: Introduction to Data Science: Laying the Foundation

In this first module of the Citizen Data Scientist course series, we explore the foundational principles of Data Science. From understanding key concepts like machine learning and the CRISP-DM process to getting hands-on with Python and essential libraries, this post lays the groundwork for your journey into the world of data-driven decision-making.

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Getting Started with Python for Data Science: A Hands-On Introduction
Python, Data Science Kamil Pospiech Python, Data Science Kamil Pospiech

Getting Started with Python for Data Science: A Hands-On Introduction

Welcome to the practical world of Python for Data Science, where we learn how to turn data into meaningful results.

This post walks you through key techniques and tools in Python, showing how they can be applied to real-world data science tasks. Whether you’re just starting out or looking to solidify your skills, this guide offers a hands-on approach to mastering Python for data science.

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Beginner's Guide to Heat Transfer: Understanding the Basics of Energy Flow
Heat Transfer Kamil Pospiech Heat Transfer Kamil Pospiech

Beginner's Guide to Heat Transfer: Understanding the Basics of Energy Flow

Discover the fascinating world of heat transfer and learn how energy moves around us, from the warmth of a cozy fireplace to the cooling breeze of a fan.

This post breaks down the basics of conduction, convection, and radiation, using real-life examples to make complex science easy to understand. Whether you're a curious learner or a budding engineer, join us on this journey to see how heat shapes our everyday lives.

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